Net Position of Uncompleted Construction Contracts (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Contracts In Progress Costs And Earnings [Line Items]
Costs incurred on uncompleted contracts	$ 97,372	$ 542,994
Estimated earnings	4,584	22,526
Billings	(102,319)	(568,550)
Net position	(363)	(3,030)
Construction contract costs and estimated earnings in excess of billings	1,178	1,206
Billings in excess of construction contract costs and estimated earnings	(1,541)	(4,236)
Net position	$ (363)	$ (3,030)